CVE-2026-93894: CWE-787 Out-of-bounds Write in Vinyl-Cache Vinyl Cache
CVE-2026-93894 is a low-severity out-of-bounds write vulnerability in Vinyl Cache before version 9.0.2. It affects the .upper() and .lower() string methods in the Vinyl Cache Language (VCL), allowing a workspace buffer overflow. Exploitation can cause a remote denial of service by crashing the child process, which then restarts. Successful exploitation requires detailed knowledge of the VCL and crafting a request with a string long enough to overflow the workspace but within request size limits.
AI Analysis
Technical Summary
This vulnerability (CWE-787) exists in Vinyl Cache versions prior to 9.0.2 in the .upper() and .lower() string methods of VCL. It is a workspace buffer overflow that can be triggered remotely by sending a specially crafted request string that fills the remaining workspace buffer. The result is a child process crash (segfault or assert), causing a denial of service through process restart. Exploitation requires prior knowledge of the VCL and careful crafting of input to meet size constraints.
Potential Impact
The primary impact is a remote denial of service condition where the child process crashes and restarts. There is no indication of code execution, data corruption beyond the buffer overflow, or information disclosure. The CVSS score of 2.3 reflects the low severity and limited impact.
Mitigation Recommendations
A fix is available in Vinyl Cache version 9.0.2 and later. Users should upgrade to version 9.0.2 or newer to remediate this vulnerability. Patch status is confirmed by the affected versions data. No additional mitigation steps are indicated.
CVE-2026-93894: CWE-787 Out-of-bounds Write in Vinyl-Cache Vinyl Cache
Description
CVE-2026-93894 is a low-severity out-of-bounds write vulnerability in Vinyl Cache before version 9.0.2. It affects the .upper() and .lower() string methods in the Vinyl Cache Language (VCL), allowing a workspace buffer overflow. Exploitation can cause a remote denial of service by crashing the child process, which then restarts. Successful exploitation requires detailed knowledge of the VCL and crafting a request with a string long enough to overflow the workspace but within request size limits.
CVSS v4.0
Score 2.3low
Affected software
Vinyl-Cache
Vinyl Cache
Varnish-Software
Varnish Cache
pkg:github/vinyl-cache/vinyl-cacheRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-787) exists in Vinyl Cache versions prior to 9.0.2 in the .upper() and .lower() string methods of VCL. It is a workspace buffer overflow that can be triggered remotely by sending a specially crafted request string that fills the remaining workspace buffer. The result is a child process crash (segfault or assert), causing a denial of service through process restart. Exploitation requires prior knowledge of the VCL and careful crafting of input to meet size constraints.
Potential Impact
The primary impact is a remote denial of service condition where the child process crashes and restarts. There is no indication of code execution, data corruption beyond the buffer overflow, or information disclosure. The CVSS score of 2.3 reflects the low severity and limited impact.
Mitigation Recommendations
A fix is available in Vinyl Cache version 9.0.2 and later. Users should upgrade to version 9.0.2 or newer to remediate this vulnerability. Patch status is confirmed by the affected versions data. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-18T20:30:04.310Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aada35c55bf5e2cf587fb16
Added to database: 09/18/2026, 20:47:24 UTC
Last enriched: 09/18/2026, 21:01:43 UTC
Last updated: 09/18/2026, 21:32:29 UTC
Views: 5
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